处理来自表格的数据时遇到问题

当用户添加相册时，它显示在ListView。假设你选择用户编写的lovesong专辑处理来自表格的数据时遇到问题

歌曲名称和标题并保存到歌曲表（歌曲，albumid，歌曲名，歌词）。

从歌曲表中获取歌曲，我使用

public ArrayList<Alldata> getMyData(long id)  
{  
    ArrayList<Alldata> arrayList=new ArrayList<Alldata>();  
    Cursor c=db.query(DATABASE_TABLE_SONG, new String[]{KEY_SONG_ID,KEY_ALBUM_ID,KEY_SONG_NAME,KEY_SONG_TITEL}, KEY_ALBUM_ID+"="+id, null,null,null,null);  
    Alldata myDatas; 

    while(c.moveToNext()) 
    { 
     myDatas=new Alldata(); 
     myDatas.song_id=c.getLong(c.getColumnIndex(KEY_SONG_ID));   
     myDatas.album_id=c.getInt(c.getColumnIndex(KEY_ALBUM_ID));   
     myDatas.song_name=c.getString(c.getColumnIndex(KEY_SONG_NAME)).trim();   
     myDatas.song_title=c.getString(c.getColumnIndex(KEY_SONG_TITEL)).trim();    

     arrayList.add(myDatas); 
    } 
    c.close();  
    return arrayList;  
}  

public void onClick(View v)  
{ 
    Alldata data=new Alldata();  
    AlbumDAO albumDAO=new AlbumDAO(SongActivity.this);  
    albumDAO.open();  
    ArrayList<Alldata> mydata=albumDAO.getMyData(albumid);  
    data=mydata.get(albumid);  
    Log.v("data.getAlbum_id()",data.getAlbum_id()+"");    

    albumDAO.close(); 
    } 
});

/////////////////// logcat的/////////// ///////////

02-06 18:07:37.948: ERROR/AndroidRuntime(27144): Uncaught handler: thread main exiting due to uncaught exception 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144): java.lang.IndexOutOfBoundsException: Invalid location 1, size is 0 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at java.util.ArrayList.get(ArrayList.java:341) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at krishna.ActionClass.SongActivity$2.onClick(SongActivity.java:79) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at android.view.View.performClick(View.java:2364) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at android.view.View.onTouchEvent(View.java:4179) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at android.widget.TextView.onTouchEvent(TextView.java:6541) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at android.view.View.dispatchTouchEvent(View.java:3709) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at android.app.Activity.dispatchTouchEvent(Activity.java:2061) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1691) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at android.os.Handler.dispatchMessage(Handler.java:99) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at android.os.Looper.loop(Looper.java:123) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at android.app.ActivityThread.main(ActivityThread.java:4363) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at java.lang.reflect.Method.invokeNative(Native Method) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at java.lang.reflect.Method.invoke(Method.java:521) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 
02-06 18:07:38.069: ERROR/AndroidRuntime(27144):  at dalvik.system.NativeStart.main(Native Method)

来源

2012-02-06 arpit

你叫什么问题？ – Natali 2012-02-06 12:08:56

我想显示列表中的所有歌曲（基于albumid），但我有indexoutofbound异常... – arpit 2012-02-06 12:14:48

什么是异常？把你的日志 – Richa 2012-02-06 12:27:50

你的数据库似乎返回0，行，尽量包裹while循环中，如果（c.moveToFirst（）），所以

if(c.moveToFirst()) 
{ 
while(c.moveToNext()) 
    { 
     myDatas=new Alldata(); 
     myDatas.song_id=c.getLong(c.getColumnIndex(KEY_SONG_ID));   
     myDatas.album_id=c.getInt(c.getColumnIndex(KEY_ALBUM_ID));   
     myDatas.song_name=c.getString(c.getColumnIndex(KEY_SONG_NAME)).trim();   
     myDatas.song_title=c.getString(c.getColumnIndex(KEY_SONG_TITEL)).trim();    
     arrayList.add(myDatas); 
    } 
}

来源

2012-02-06 15:52:20 mbwasi

'c.moveToFirst（）'应该够了，需要'c.moveToNext（）' – Hank 2012-02-06 16:40:01

因为应该只有一个返回值，所以ArrayList也是不必要的。 – mbwasi 2012-02-07 11:08:27

处理来自表格的数据时遇到问题

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